Phuthuma Nhleko, who increased MTN's subscribers almost 30-fold during his nine-year tenure as chief executive officer, is becoming chairperson.
The person who leaked the MTN and Turkcell memos has to face the possibility of being implicated in the bribery of Iran government officials' claims.
Former MTN boss Phuthuma Nhleko has distanced himself from a dodgy mobile operating license in Iran that included bribes, weapons and influence.
The department of international relations and cooperations says government can't be bought but recent reports have contradicted this statement.
A rival company has lodged evidence in a United States court that details how South African company -- MTN -- secured a lucrative deal in Iran.
South African cement giant Afrisam is at the centre of a war between local and international investors.
South Africa's MTN Group said on Thursday its outgoing chief executive officer Phuthuma Nhleko will step down as director of the group.
Africa's largest mobile operator MTN on Monday said it had appointed Sifiso Dabengwa as its chief executive officer, to replace Phuthuma Nhelko.
Phuthuma Nhleko, CEO of cellphone group MTN, will step down as CEO and group president in March 2011, the group said on Monday.
Phuthuma Nhleko, CEO of MTN, could receive R300-million from the group's takeover of a structure that was set up to boost black ownership.
Merger talks between India's biggest cellphone services firm, Bharti Airtel, and South Africa's flagship MTN Group could wind up this weekend, a report said on Saturday. A merged group would create the world's sixth-largest mobile company with a network of 130-million subscribers.
South African stocks continued to run in record territory at midday on Monday, buoyed by miners on firmer metal prices while an upbeat mood in overseas markets added to the bullish tone. The market touched 33 116,051 during the session, an all-time high.
India's Reliance Communications is prepared to pay a significant premium for control of South African mobile phone group MTN, the FT Alphaville website said on Thursday. MTN and Reliance said on Monday they were in exclusive talks after India's biggest mobile phone operator Bharti Airtel broke off talks.